Comment 42 for bug 1372413

On Monday, February 9, 2015, Colin Ian King <email address hidden>
wrote:
> I've correlated each processes against the spike in activity for upowerd
> and also see that mpdecision and systemd-udevd also change their
> behaviors at that transition. See attached spreadsheet.

mpdecision is the proprietary service that changes the cpu clock and
enable/disable the other cpus, so that is just a side effect of others
taking more cpu processing.

> ** Attachment added: "upowerd-procs.ods"
>
https://bugs.launchpad.net/ubuntu/+source/powerd/+bug/1372413/+attachment/4315533/+files/upowerd-procs.ods
>
> --
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> in Ubuntu.
> https://bugs.launchpad.net/bugs/1372413
>
> Title:
> Extensive battery drain on RTM
>
> Status in the base for Ubuntu mobile products:
> In Progress
> Status in powerd package in Ubuntu:
> Confirmed
>
> Bug description:
> Mako, RTM 1
>
> Since upgrading to RTM the battery life is really poor. What used to
> be a battery drain of 5-10% per hour (which is still high) is now
> 10-15% per hour. Sometimes the phone runs really hot, so there seem to
> be something going on in the background that is consuming power. I
> mostly have bluetooth, GPS (which isn't always working), wifi and
> cellular on, but that's no difference from when I was running 'devel-
> proposed' with MultiROM with much less battery consumption.
>
> As an example, I started with a full charge at 7am. After some web
> surfing (<15 mins) and watching a couple of youtube videos (on wifi)
> battery was down to 66% at 9:15. That's 34% in just over two hours! I
> recharged again before lunch and had the phone idle until coming back
> 1 hour and 45 mins later to find only 75% of battery left, this time
> without the phone running particularly hot.
>
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>
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>

--
Ricardo Salveti de Araujo